27748177313 has 4 divisors (see below), whose sum is σ = 27793005360. Its totient is φ = 27703349268.

The previous prime is 27748177309. The next prime is 27748177349. The reversal of 27748177313 is 31377184772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27748177313 - 2² = 27748177309 is a prime.

It is a super-2 number, since 2×27748177313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27748197313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22413095 + ... + 22414332.

It is an arithmetic number, because the mean of its divisors is an integer number (6948251340).

Almost surely, 2^27748177313 is an apocalyptic number.

It is an amenable number.

27748177313 is a deficient number, since it is larger than the sum of its proper divisors (44828047).

27748177313 is an equidigital number, since it uses as much as digits as its factorization.

27748177313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44828046.

The product of its digits is 1382976, while the sum is 50.

The spelling of 27748177313 in words is "twenty-seven billion, seven hundred forty-eight million, one hundred seventy-seven thousand, three hundred thirteen".